Lemon
 |
A Kepler. 
It consists of less than half of a circularArc rotated about an axis passing through the endpoints of the Arc. The equations of the upper and lowerboundaries in the 
plane are
for
and 
. The Cross-Section of a lemon is a Lens.The lemon is the inside surface of a Spindle Torus.See also Apple, Lens, Spindle Torus- Curve of Constant Slope
- Curve of Constant Width
- Curvilinear Coordinates
- Cushion
- Cusp
- Cusp Catastrophe
- Cusp Form
- Cusp Map
- Cusp Point
- Cutting
- Cut-Vertex
- CW-Approximation Theorem
- CW-Complex
- Transfinite Diameter
- Transfinite Number
- Transform
- Transformation
- Transitive
- Transitive Closure
- Transitive Reduction
- Transitivity Class
- Translation
- Translation Relation
- Transpose
- Transpose Map